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I IO UNITED STATES PATENT OFFIcE.

ROBERT F. DIOKSON, OF ATOKA, TENNESSEE.

COMPOSITION FOR CLEANING MARBLE SURFACES.

SPEC IFIGATION forming' part of Letters Patent No. 290,754, datedDecember 25, 1883.

I Application filed January 29, 1883. (No specimens) To all whom it mayconcern Be it known that I, ROBERT F. DIGKSON, a

citizen of the United States of America, re-

siding at Atoka, in the county of Tipton and State of Tennessee, haveinvented certain new and useful Improvements in a Liquid Oompound forCleansing Marble Surfaces; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention consists in a new liquid compound for cleaning marblesurfaces, or removing discolorations from any surface of similarcomposition; and it has for its object to cleanse the surfaces of bodiesof the kind stated by means of a cheap and simple liquid chemicalcompound, which can be readily applied, and which will effectuallyaccomplish the purpose intended.

To attain the purpose of my invention, I make a compound consisting ofmuratic acid and clear ammonia, in the proportion of three parts ofmuratic acid and one part of clear ammonia,which compound I apply with astiff brush to the surface to be cleansed, after which I Wash off thesurface to which the cleansing compound has been applied with water andsponge, the operation to be repeated should the first application failto entirely effect the purpose.

This compound will be found useful for cleansing any marble, especiallyweatherbeaten tombstones or any article discolored by exposure and age.The proportions of the ingredients may be slightly varied from theformula hereinbefore stated, but I find from practice that the formulastated is about correct, and meets the end desired. This liquidcompound, composed of only two ingredients, is manufactured readily andat a small cost, and requires no skill or special preparation to applyit to the object to be cleaned.

WVhat I claim as my invention, and desire to secure by Letters Patent,is-

The fluid composition for cleaning marble surfaces, consisting ofmuriatic acid, three parts, and clear ammonia, one part, substantiallyas set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ROBERT F. DIOKSON.

IVitnesses:

0; W. DIcKsoN, J. M. DIoKsoN.

